commands/auth: fix 0-return on unsuccessful login attempts (mattermos…

…t#499)

* commands/auth: fix 0-return on unsuccessful login attempts

* reflect review comments

commands/auth.go

@@ -209,9 +209,7 @@ func loginCmdF(cmd *cobra.Command, args []string) error {
 			c, _, err = InitClientWithUsernameAndPassword(username, password, url, allowInsecureSHA1, allowInsecureTLS)
 		}
 		if err != nil {
-			printer.PrintError(err.Error())
-			// We don't want usage to be printed as the command was correctly built
-			return nil
+			return fmt.Errorf("could not initiate client: %w", err)
 		}
 		accessToken = c.AuthToken
 	} else {
@@ -222,9 +220,7 @@ func loginCmdF(cmd *cobra.Command, args []string) error {
 			AuthToken:   accessToken,
 		}
 		if _, _, err := InitClientWithCredentials(&credentials, allowInsecureSHA1, allowInsecureTLS); err != nil {
-			printer.PrintError(err.Error())
-			// We don't want usage to be printed as the command was correctly built
-			return nil
+			return fmt.Errorf("could not initiate client: %w", err)
 		}
 	}