diff --git a/.gitignore b/.gitignore
index 150a35b..40e9e7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 /target
 .idea
 /database
+/test_database
+config.toml
diff --git a/Cargo.lock b/Cargo.lock
index 19a5ff3..f1b2dad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,40 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -63,12 +98,43 @@ checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
 dependencies = [
  "libc",
  "num-integer",
- "num-traits",
- "serde",
+ "num-traits 0.2.14",
+ "serde 1.0.124",
  "time",
  "winapi",
 ]
 
+[[package]]
+name = "clap"
+version = "2.33.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37e58ac78573c40708d45522f0d80fa2f01cc4f9b4e2bf749807255454312002"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
+[[package]]
+name = "config"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b1b9d958c2b1368a663f05538fc1b5975adce1e19f435acceae987aceeeb369"
+dependencies = [
+ "lazy_static",
+ "nom",
+ "rust-ini",
+ "serde 1.0.124",
+ "serde-hjson",
+ "serde_json",
+ "toml",
+ "yaml-rust",
+]
+
 [[package]]
 name = "cpuid-bool"
 version = "0.1.2"
@@ -228,10 +294,12 @@ dependencies = [
 name = "geoffrey_api"
 version = "0.1.0"
 dependencies = [
+ "config",
  "geoffrey_db",
  "geoffrey_models",
- "serde",
+ "serde 1.0.124",
  "serde_json",
+ "structopt",
  "tokio",
  "warp",
 ]
@@ -243,7 +311,7 @@ dependencies = [
  "byteorder",
  "geoffrey_models",
  "lazy_static",
- "serde",
+ "serde 1.0.124",
  "serde_json",
  "sled",
 ]
@@ -253,7 +321,7 @@ name = "geoffrey_models"
 version = "0.1.0"
 dependencies = [
  "chrono",
- "serde",
+ "serde 1.0.124",
  "serde_json",
 ]
 
@@ -329,6 +397,15 @@ dependencies = [
  "http",
 ]
 
+[[package]]
+name = "heck"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.18"
@@ -446,12 +523,31 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
+[[package]]
+name = "lexical-core"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6607c62aa161d23d17a9072cc5da0be67cdfc89d3afb1e8d9c842bebc2525ffe"
+dependencies = [
+ "arrayvec",
+ "bitflags",
+ "cfg-if",
+ "ryu",
+ "static_assertions",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "03b07a082330a35e43f63177cc01689da34fbffa0105e1246cf0311472cac73a"
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
+
 [[package]]
 name = "lock_api"
 version = "0.4.2"
@@ -548,6 +644,17 @@ dependencies = [
  "twoway",
 ]
 
+[[package]]
+name = "nom"
+version = "5.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffb4262d26ed83a1c0a33a38fe2bb15797329c85770da05e6b828ddb782627af"
+dependencies = [
+ "lexical-core",
+ "memchr",
+ "version_check",
+]
+
 [[package]]
 name = "ntapi"
 version = "0.3.6"
@@ -564,7 +671,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
 dependencies = [
  "autocfg",
- "num-traits",
+ "num-traits 0.2.14",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
+dependencies = [
+ "num-traits 0.2.14",
 ]
 
 [[package]]
@@ -667,6 +783,30 @@ version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.24"
@@ -781,6 +921,23 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "regex"
+version = "1.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a26af418b574bd56588335b3a3659a65725d4e636eb1016c2f9e3b38c7cc759"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
+
 [[package]]
 name = "remove_dir_all"
 version = "0.5.3"
@@ -790,6 +947,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "rust-ini"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e52c148ef37f8c375d49d5a73aa70713125b7f19095948a923f80afdeb22ec2"
+
 [[package]]
 name = "ryu"
 version = "1.0.5"
@@ -814,6 +977,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
+[[package]]
+name = "serde"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dad3f759919b92c3068c696c15c3d17238234498bbdcc80f2c469606f948ac8"
+
 [[package]]
 name = "serde"
 version = "1.0.124"
@@ -823,6 +992,18 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde-hjson"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a3a4e0ea8a88553209f6cc6cfe8724ecad22e1acf372793c27d995290fe74f8"
+dependencies = [
+ "lazy_static",
+ "num-traits 0.1.43",
+ "regex",
+ "serde 0.8.23",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.124"
@@ -842,7 +1023,7 @@ checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79"
 dependencies = [
  "itoa",
  "ryu",
- "serde",
+ "serde 1.0.124",
 ]
 
 [[package]]
@@ -854,7 +1035,7 @@ dependencies = [
  "form_urlencoded",
  "itoa",
  "ryu",
- "serde",
+ "serde 1.0.124",
 ]
 
 [[package]]
@@ -918,6 +1099,42 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
+
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
+[[package]]
+name = "structopt"
+version = "0.3.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5277acd7ee46e63e5168a80734c9f6ee81b1367a7d8772a2d765df2a3705d28c"
+dependencies = [
+ "clap",
+ "lazy_static",
+ "structopt-derive",
+]
+
+[[package]]
+name = "structopt-derive"
+version = "0.4.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ba9cdfda491b814720b6b06e0cac513d922fc407582032e8706e9f137976f90"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.61"
@@ -943,6 +1160,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"
@@ -1038,6 +1264,15 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "toml"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a31142970826733df8241ef35dc040ef98c679ab14d7c3e54d827099b3acecaa"
+dependencies = [
+ "serde 1.0.124",
+]
+
 [[package]]
 name = "tower-service"
 version = "0.3.1"
@@ -1142,6 +1377,18 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
@@ -1166,6 +1413,12 @@ version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "05e42f7c18b8f902290b009cde6d651262f956c98bc51bca4cd1d511c9cd85c7"
 
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
 [[package]]
 name = "version_check"
 version = "0.9.2"
@@ -1200,7 +1453,7 @@ dependencies = [
  "percent-encoding",
  "pin-project",
  "scoped-tls",
- "serde",
+ "serde 1.0.124",
  "serde_json",
  "serde_urlencoded",
  "tokio",
@@ -1245,3 +1498,12 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "yaml-rust"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
+dependencies = [
+ "linked-hash-map",
+]
diff --git a/geoffrey_api/Cargo.toml b/geoffrey_api/Cargo.toml
index 9026419..af35297 100644
--- a/geoffrey_api/Cargo.toml
+++ b/geoffrey_api/Cargo.toml
@@ -12,4 +12,6 @@ warp = "0.3"
 serde = "1.0.124"
 serde_json = "1.0.64"
 geoffrey_models = { path = "../geoffrey_models" }
-geoffrey_db = { path = "../geoffrey_db" }
\ No newline at end of file
+geoffrey_db = { path = "../geoffrey_db" }
+config = "0.11.0"
+structopt = "0.3.21"
\ No newline at end of file
diff --git a/geoffrey_db/src/database.rs b/geoffrey_db/src/database.rs
index f2acbfa..e958879 100644
--- a/geoffrey_db/src/database.rs
+++ b/geoffrey_db/src/database.rs
@@ -1,8 +1,7 @@
-use crate::error::Result;
+use crate::error::{Result, GeoffreyDBError};
 use std::path::Path;
 use geoffrey_models::GeoffreyDatabaseModel;
-use crate::{u64_from_bytes, u64_to_bytes};
-use sled::Iter;
+use std::convert::TryInto;
 
 pub struct Database {
     db: sled::Db,
@@ -31,8 +30,16 @@ impl Database {
             }
         };
 
+        let match_count = self.filter(|_, o: &T| {
+            !o.check_unique(&model)
+        })?.count();
+
+        if match_count > 0 {
+            return Err(GeoffreyDBError::NotUnique)
+        }
+
         let tree = self.get_tree::<T>()?;
-        let id_bytes = u64_to_bytes(id);
+        let id_bytes = id.to_be_bytes();
 
         tree.insert(id_bytes, model.to_bytes()?)?;
 
@@ -42,7 +49,7 @@ impl Database {
 
     pub fn get<T>(&self, id: u64) -> Result<Option<T>> where T: GeoffreyDatabaseModel {
         let tree = self.get_tree::<T>()?;
-        let id_bytes = u64_to_bytes(id);
+        let id_bytes = id.to_be_bytes();
 
         if let Some(bytes) = tree.get(id_bytes)? {
             Ok(Some(T::try_from_bytes(&bytes)?))
@@ -53,12 +60,16 @@ impl Database {
 
     }
 
-    pub fn filter<T, F>(&self, f: F) -> Result<Vec<T>> where T: GeoffreyDatabaseModel, F: Fn(u64, &T) -> bool {
+    pub fn clear_tree<T>(&self) -> Result<()> where T: GeoffreyDatabaseModel {
+        Ok(self.db.open_tree(T::tree())?.clear()?)
+    }
+
+    pub fn filter<'a, T>(&self, f: impl Fn(u64, &T) -> bool + 'a) -> Result<impl Iterator<Item=T> + 'a> where T: GeoffreyDatabaseModel {
         let tree = self.db.open_tree(T::tree())?;
 
-        Ok(tree.iter().filter_map(|e| {
+        Ok(tree.iter().filter_map(move |e| {
             if let Ok((id, data)) = e {
-                let id = u64_from_bytes(&mut id.clone());
+                let id = u64::from_be_bytes(id.to_vec().try_into().unwrap());
                 let data = T::try_from_bytes(&data).unwrap();
 
                 if f(id, &data) {
@@ -71,10 +82,10 @@ impl Database {
             else {
                 None
             }
-        }).collect())
+        }))
     }
 
-    pub fn tree_iter<T>(&self) -> Result<Iter> where T: GeoffreyDatabaseModel {
+    pub fn tree_iter<T>(&self) -> Result<sled::Iter> where T: GeoffreyDatabaseModel {
         Ok(self.db.open_tree(T::tree()).map(|tree| tree.iter())?)
     }
 }
@@ -86,13 +97,18 @@ mod tests {
     use geoffrey_models::models::player::{Player, UserID};
     use lazy_static::lazy_static;
     use geoffrey_models::GeoffreyDatabaseModel;
+    use geoffrey_models::models::locations::{Location, LocationType};
+    use geoffrey_models::models::{Position, Dimension};
+    use std::time::Instant;
 
     lazy_static! {
-        static ref DB: Database = Database::new(Path::new("../locations")).unwrap();
+        static ref DB: Database = Database::new(Path::new("../test_database")).unwrap();
     }
 
     fn cleanup() {
-        DB.db.clear().unwrap();
+        DB.clear_tree::<Player>().unwrap();
+        DB.clear_tree::<Location>().unwrap();
+        DB.db.flush().unwrap();
     }
 
     #[test]
@@ -103,6 +119,19 @@ mod tests {
 
         assert!(p2.id().is_some());
         assert_eq!(player.name, p2.name);
+
+
+        cleanup();
+    }
+
+    #[test]
+    fn test_unique_insert() {
+        let player1 = Player::new("CoolZero123", UserID::DiscordUUID(0u64));
+        let player2 = Player::new("CoolZero123", UserID::DiscordUUID(0u64));
+
+        DB.insert::<Player>(player1.clone()).unwrap();
+        assert_eq!(DB.insert::<Player>(player2.clone()).is_err(), true);
+
         cleanup();
     }
 
@@ -118,5 +147,40 @@ mod tests {
         assert_eq!(p3.unwrap().name, player.name);
         cleanup();
     }
+
+    #[test]
+    fn test_filter() {
+        let player = Player::new("CoolZero123", UserID::DiscordUUID(0u64));
+        let player = DB.insert::<Player>(player.clone()).unwrap();
+        let loc = Location::new("Test Shop", Position::new(0, 0, Dimension::Overworld),  player.id.unwrap(), None, LocationType::Shop(0));
+        let loc = DB.insert::<Location>(loc.clone()).unwrap();
+
+        let count = DB.filter(|id: u64, l: &Location| {
+            assert_eq!(id, l.id().unwrap());
+            loc.id().unwrap() == id
+        }).unwrap().count();
+
+        assert_eq!(count, 1);
+        DB.db.flush().unwrap();
+        cleanup();
+    }
+
+    #[test]
+    fn test_insert_speed() {
+        cleanup();
+        let insert_count = 1000;
+        let timer = Instant::now();
+        for i in 0..insert_count {
+            let player = Player::new("test", UserID::DiscordUUID(i));
+
+            DB.insert::<Player>(player).unwrap();
+        }
+
+        DB.db.flush().unwrap();
+        let sec_elapsed = timer.elapsed().as_secs_f32();
+        println!("Completed in {}s. {} inserts per second", sec_elapsed, insert_count as f32/sec_elapsed);
+
+        cleanup()
+    }
 }
 
diff --git a/geoffrey_db/src/error.rs b/geoffrey_db/src/error.rs
index 4d54e49..173f18f 100644
--- a/geoffrey_db/src/error.rs
+++ b/geoffrey_db/src/error.rs
@@ -1,10 +1,10 @@
-
 pub type Result<T> = std::result::Result<T, GeoffreyDBError>;
 
 #[derive(Debug)]
 pub enum GeoffreyDBError {
     SledError(sled::Error),
     SerdeJsonError(serde_json::Error),
+    NotUnique,
 }
 
 impl std::error::Error for GeoffreyDBError {}
@@ -13,7 +13,8 @@ impl std::fmt::Display for GeoffreyDBError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             GeoffreyDBError::SledError(e) => write!(f, "Sled Error: {}", e),
-            GeoffreyDBError::SerdeJsonError(e) => write!(f, "Serde JSON Error: {}", e)
+            GeoffreyDBError::SerdeJsonError(e) => write!(f, "Serde JSON Error: {}", e),
+            GeoffreyDBError::NotUnique => write!(f, "Entry is not unique.")
         }
     }
 }
diff --git a/geoffrey_db/src/lib.rs b/geoffrey_db/src/lib.rs
index 6a1b26f..cad3bef 100644
--- a/geoffrey_db/src/lib.rs
+++ b/geoffrey_db/src/lib.rs
@@ -1,18 +1,4 @@
 #![allow(dead_code)]
-use byteorder::{WriteBytesExt, BigEndian, ReadBytesExt};
-use std::io::Cursor;
-
 pub mod database;
 pub mod error;
 
-pub fn u64_to_bytes(n: u64) -> Vec<u8> {
-    let mut id_bytes= vec![0u8; 8];
-    id_bytes.write_u64::<BigEndian>(n).unwrap();
-
-    id_bytes
-}
-
-pub fn u64_from_bytes(bytes: &mut [u8]) -> u64 {
-    let mut cursor = Cursor::new(bytes);
-    cursor.read_u64::<BigEndian>().unwrap()
-}
diff --git a/geoffrey_models/src/models/locations/mod.rs b/geoffrey_models/src/models/locations/mod.rs
index 1bf54fb..a8e66e8 100644
--- a/geoffrey_models/src/models/locations/mod.rs
+++ b/geoffrey_models/src/models/locations/mod.rs
@@ -70,4 +70,28 @@ impl GeoffreyDatabaseModel for Location {
     fn tree() -> String {
         "location".to_string()
     }
+
+    fn check_unique(&self, o: &Self) -> bool {
+        o.name.to_lowercase() != self.name.to_lowercase()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::GeoffreyDatabaseModel;
+    use crate::models::locations::{Location, LocationType};
+    use crate::models::{Position, Dimension};
+
+    #[test]
+    fn test_location_check_unique() {
+        let l1 = Location::new("Test", Position::new(0, 0, Dimension::Overworld), 0u64, None, LocationType::Base);
+        let l2 = Location::new("NotTest", Position::new(0, 0, Dimension::Overworld), 0u64, None, LocationType::Base);
+
+        assert!(l1.check_unique(&l2));
+
+        let l1 = Location::new("Test", Position::new(0, 0, Dimension::Overworld), 0u64, None, LocationType::Base);
+        let l2 = Location::new("teSt", Position::new(0, 0, Dimension::Overworld), 0u64, None, LocationType::Base);
+
+        assert!(!l1.check_unique(&l2));
+    }
 }
diff --git a/geoffrey_models/src/models/player.rs b/geoffrey_models/src/models/player.rs
index 8b4883b..0892121 100644
--- a/geoffrey_models/src/models/player.rs
+++ b/geoffrey_models/src/models/player.rs
@@ -36,4 +36,34 @@ impl GeoffreyDatabaseModel for Player {
     fn tree() -> String {
         "player".to_string()
     }
+
+    fn check_unique(&self, o: &Self) -> bool {
+        for user1_id in &self.user_ids {
+            if o.user_ids.contains(user1_id) {
+                return false;
+            }
+        }
+
+        true
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::models::player::Player;
+    use crate::models::player::UserID::{DiscordUUID, MinecraftUUID};
+    use crate::GeoffreyDatabaseModel;
+
+    #[test]
+    fn test_player_check_unique() {
+        let p1 = Player::new("CoolTest123", DiscordUUID(0u64));
+        let p2 = Player::new("NotCoolTest123", DiscordUUID(1u64));
+
+        assert!(p1.check_unique(&p2));
+
+        let p1 = Player::new("CoolTest123", MinecraftUUID("0".to_string()));
+        let p2 = Player::new("NotCoolTest123", MinecraftUUID("0".to_string()));
+
+        assert!(!p1.check_unique(&p2));
+    }
 }
\ No newline at end of file