Give more specific reason for failed login

src/components/login_form/login_form.js

@@ -10,8 +10,8 @@ const LoginForm = {
     submit () {
       this.$store.dispatch('loginUser', this.user).then(
         () => { this.$router.push('/main/friends')}, 
-        () => {
-          this.authError = true
+        (error) => {
+          this.authError = error
           this.user.username = ''
           this.user.password = ''
         }

src/components/login_form/login_form.vue

@@ -18,7 +18,7 @@
           <button :disabled="loggingIn" type='submit' class='btn btn-default base05 base01-background'>Submit</button>
         </div>
         <div v-if="authError" class='form-group'>
-          <button disabled='true' class='btn btn-default base05 error'>Error logging in, try again</button>
+          <button disabled='true' class='btn btn-default base05 error'>{{authError}}</button>
         </div>
       </form>
     </div>

src/modules/users.js

@@ -96,7 +96,11 @@ const users = {
             } else {
               // Authentication failed
               commit('endLogin')
-              reject()
+              if (response.status === 401) {
+                reject('Wrong username or password')
+              } else {
+                reject('An error occured, please try again')
+              }
             }
             commit('endLogin')
             resolve()
@@ -104,7 +108,7 @@ const users = {
           .catch((error) => {
             console.log(error)
             commit('endLogin')
-            reject()
+            reject('Failed to connect to server, try again')
           })
       })
     }