Several fixes, improvements, refactor for authentication

src/services/authentication.ts

@@ -6,8 +6,10 @@ import { getDomain } from '@/application/utilities'
 export async function register(username: string, email: string, password: string) {
   try {
     const response = await axios.post(`${config.server_endpoint}/register`, { username, email, password })
-    useCookies().set('token', response.data.data.token as string)
-    return { success: true, token: response.data.data.token }
+    if (response.status === 200) {
+      return { success: true }
+    }
+    return { error: response.data.message }
   } catch (error: any) {
     if (typeof error.response?.data === 'undefined') {
       return { error: 'Could not connect to server' }