Use kv datastore for auth (#272)

lib/utils.ts

@@ -61,3 +61,29 @@ export const getStringFromBuffer = (buffer: ArrayBuffer) =>
   Array.from(new Uint8Array(buffer))
     .map(b => b.toString(16).padStart(2, '0'))
     .join('')
+
+export enum ResultCode {
+  InvalidCredentials = 'INVALID_CREDENTIALS',
+  InvalidSubmission = 'INVALID_SUBMISSION',
+  UserAlreadyExists = 'USER_ALREADY_EXISTS',
+  UnknownError = 'UNKNOWN_ERROR',
+  UserCreated = 'USER_CREATED',
+  UserLoggedIn = 'USER_LOGGED_IN'
+}
+
+export const getMessageFromCode = (resultCode: string) => {
+  switch (resultCode) {
+    case ResultCode.InvalidCredentials:
+      return 'Invalid credentials!'
+    case ResultCode.InvalidSubmission:
+      return 'Invalid submission, please try again!'
+    case ResultCode.UserAlreadyExists:
+      return 'User already exists, please log in!'
+    case ResultCode.UserCreated:
+      return 'User created, welcome!'
+    case ResultCode.UnknownError:
+      return 'Something went wrong, please try again!'
+    case ResultCode.UserLoggedIn:
+      return 'Logged in!'
+  }
+}