fix: return error/nil on login cmd run

cmd/login.go

@@ -15,13 +15,14 @@ and usage of using your command. For example:
 Cobra is a CLI library for Go that empowers applications.
 This application is a tool to generate the needed files
 to quickly create a Cobra application.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	RunE: func(cmd *cobra.Command, args []string) error {
 		noLocalhostFlag, _ := cmd.Flags().GetBool("no-localhost")
 		if noLocalhostFlag {
-			oauth.LoginWithoutLocalhost()
+			return oauth.LoginWithoutLocalhost()
 		} else {
 			oauth.LoginWithLocalhost()
 		}
+		return nil
 	},
 }