Refactor for global error type

shared/src/lib.rs

@@ -0,0 +1 @@
+pub mod types;

shared/src/types.rs

@@ -0,0 +1,21 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub enum ErrorCode {
+    Error,
+    Unauthorized,
+    EmailTaken,
+    UsernameTaken,
+    InvalidLoginCode,
+    InvalidImage,
+    InvalidUsername,
+    InvalidEmail,
+    InvalidToken,
+    UnableToConnectToMail,
+    UnableToSendMail,
+    
+    MessageNotFound,
+    RoomNotFound,
+    UserNotFound,
+    MalformedDBResponse,
+}