diff --git a/auth/Cargo.toml b/auth/Cargo.toml
index b653122..dfdeca2 100644
--- a/auth/Cargo.toml
+++ b/auth/Cargo.toml
@@ -12,4 +12,6 @@ tracing = "0.1.40"
 serde = { version = "1.0.203", features = ["derive"] }
 chrono = { version = "0.4.24", features = ["serde"] }
 dotenvy = "0.15"
-sqlx = { version = "0.7", features = [ "runtime-tokio", "tls-rustls", "mysql", "chrono" ] }
\ No newline at end of file
+sqlx = { version = "0.7", features = [ "runtime-tokio", "tls-rustls", "mysql", "chrono" ] }
+sha3 = "0.10.8"
+hex = "0.4.3"
diff --git a/auth/src/main.rs b/auth/src/main.rs
index 11652bc..2535e2e 100644
--- a/auth/src/main.rs
+++ b/auth/src/main.rs
@@ -31,6 +31,7 @@ async fn main() -> anyhow::Result<()> {
                 id SERIAL,
                 username VARCHAR(255) NOT NULL,
                 email VARCHAR(255) NOT NULL,
+                avatar TEXT NOT NULL
                 login_code INT(6),
                 tokens TEXT,
                 google_oauth VARCHAR(255),
@@ -56,7 +57,7 @@ async fn main() -> anyhow::Result<()> {
         // serve is generated by the service attribute. It takes as input any type implementing
         // the generated World trait.
         .map(|channel| {
-            let server = RealmAuthServer::new(channel.transport().peer_addr().unwrap());
+            let server = RealmAuthServer::new(channel.transport().peer_addr().unwrap(), db_pool);
             channel.execute(server.serve()).for_each(spawn)
         })
         // Max 10 channels.
diff --git a/auth/src/server.rs b/auth/src/server.rs
index 794b2ba..51a1667 100644
--- a/auth/src/server.rs
+++ b/auth/src/server.rs
@@ -1,22 +1,86 @@
 use std::net::SocketAddr;
+
+use sha3::{Digest, Sha3_256};
+use sha3::digest::Update;
+use sqlx::{MySql, Pool, Row};
 use tarpc::context::Context;
-use crate::types::RealmAuth;
+
+use crate::types::{AuthUser, ErrorCode, RealmAuth};
 
 #[derive(Clone)]
 pub struct RealmAuthServer {
     pub socket: SocketAddr,
+    pub db_pool: Pool<MySql>,
 }
 
 impl RealmAuthServer {
-    pub fn new(socket: SocketAddr) -> RealmAuthServer {
+    pub fn new(socket: SocketAddr, db_pool: Pool<MySql>) -> RealmAuthServer {
         RealmAuthServer {
             socket,
+            db_pool,
         }
     }
 }
 
 impl RealmAuth for RealmAuthServer {
-    async fn test(self, context: Context, name: String) -> String {
-        format!("Hello {}", name)
+    async fn test(self, _: Context, name: String) -> String {
+        format!("Hello {} auth!", name)
+    }
+
+    async fn server_token_validation(self, _: Context, server_token: String, username: String, server_id: String, domain: String, tarpc_port: u16) -> bool {
+        let result = sqlx::query("SELECT tokens FROM user WHERE username = ?").bind(username).fetch_one(&self.db_pool).await;
+
+        match result {
+            Ok(row) => {
+                let token_long: &str = row.try_get("tokens").unwrap();
+                let tokens = token_long.split(',').collect::<Vec<&str>>();
+
+                for token in tokens {
+                    let hash = Sha3_256::new().chain(format!("{}{}{}{}", token, server_id, domain, tarpc_port)).finalize();
+                    if hex::encode(hash) == server_token {
+                        return true
+                    }
+                }
+                
+                false
+            },
+            Err(_) => false,
+        }
+    }
+
+    async fn create_account(self, _: Context, username: String, email: String, avatar: String) -> Result<String, ErrorCode> {
+        todo!()
+    }
+
+    async fn create_login_flow(self, _: Context, username: String) -> ErrorCode {
+        todo!()
+    }
+
+    async fn create_token_from_login(self, _: Context, username: String, login_code: u16) -> Result<String, ErrorCode> {
+        todo!()
+    }
+
+    async fn change_email_flow(self, _: Context, username: String, token: String) -> ErrorCode {
+        todo!()
+    }
+
+    async fn resolve_email_flow(self, _: Context, username: String, token: String, login_code: u16, new_email: String) -> ErrorCode {
+        todo!()
+    }
+
+    async fn change_username(self, _: Context, username: String, token: String, new_username: String) -> ErrorCode {
+        todo!()
+    }
+
+    async fn change_avatar(self, _: Context, username: String, token: String, avatar: String) -> ErrorCode {
+        todo!()
+    }
+
+    async fn get_all_data(self, _: Context, username: String, token: String) -> Result<AuthUser, ErrorCode> {
+        todo!()
+    }
+
+    async fn get_avatar_for_user(self, _: Context, username: String) -> Result<String, ErrorCode> {
+        todo!()
     }
 }
\ No newline at end of file
diff --git a/auth/src/types.rs b/auth/src/types.rs
index 943b089..b529379 100644
--- a/auth/src/types.rs
+++ b/auth/src/types.rs
@@ -3,16 +3,20 @@ use serde::{Deserialize, Serialize};
 #[tarpc::service]
 pub trait RealmAuth {
     async fn test(name: String) -> String;
-    async fn server_token_validation(username: String, server_id: String, domain: String, tarpc_port: u16) -> bool;
+    async fn server_token_validation(server_token: String, username: String, server_id: String, domain: String, tarpc_port: u16) -> bool;
     async fn create_account(username: String, email: String, avatar: String) -> Result<String, ErrorCode>;
     async fn create_login_flow(username: String) -> ErrorCode;
     async fn create_token_from_login(username: String, login_code: u16) -> Result<String, ErrorCode>;
     
     //NOTE: Need to be the user
-    async fn change_email_flow(token: String) -> ErrorCode;
-    async fn resolve_email_flow(token: String, login_code: u16, new_email: String) -> ErrorCode;
-    async fn change_username(token: String, new_username: String) -> ErrorCode;
-    async fn change_avatar(token: String, avatar: String) -> ErrorCode;
+    async fn change_email_flow(username: String, token: String) -> ErrorCode;
+    async fn resolve_email_flow(username: String, token: String, login_code: u16, new_email: String) -> ErrorCode;
+    async fn change_username(username: String, token: String, new_username: String) -> ErrorCode;
+    async fn change_avatar(username: String, token: String, avatar: String) -> ErrorCode;
+    async fn get_all_data(username: String, token: String) -> Result<AuthUser, ErrorCode>;
+    
+    //NOTE: Anyone can call
+    async fn get_avatar_for_user(username: String) -> Result<String, ErrorCode>;
     //TODO:
     // Create account
     // Change email
@@ -32,4 +36,20 @@ pub enum ErrorCode {
     EmailTaken,
     UsernameTaken,
     InvalidLoginCode,
+    InvalidImage,
+    InvalidUsername,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AuthUser {
+    pub id: u32,
+    pub username: String,
+    pub email: String,
+    pub avatar: String,
+    pub login_code: Option<u16>,
+    pub tokens: Option<Vec<String>>,
+    pub google_oauth: Option<String>,
+    pub apple_oauth: Option<String>,
+    pub github_oauth: Option<String>,
+    pub discord_oauth: Option<String>,
 }
\ No newline at end of file