feat: add default error messages

Author: shiqimei

src/errors/ErrorApiUsageExceeded.ts

@@ -4,7 +4,7 @@ import { AskCodebaseErrorCode } from "./AskCodebaseErrorCode";
 export class ErrorApiUsageExceeded extends AskCodebaseError {
     public static code = AskCodebaseErrorCode.E10003
 
-    constructor(message: string) {
+    constructor(message: string = 'Your API usage is exceeded') {
         super(ErrorApiUsageExceeded.code, message);
     }
 }

src/errors/ErrorTokenExpired.ts

@@ -4,7 +4,7 @@ import { AskCodebaseErrorCode } from "./AskCodebaseErrorCode";
 export class ErrorTokenExpired extends AskCodebaseError {
     public static code = AskCodebaseErrorCode.E10002
 
-    constructor(message: string) {
+    constructor(message: string = 'Access token is expired') {
         super(ErrorTokenExpired.code, message);
     }
 }

src/errors/ErrorUserNull.ts

@@ -4,7 +4,7 @@ import { AskCodebaseErrorCode } from "./AskCodebaseErrorCode";
 export class ErrorUserNull extends AskCodebaseError {
     public static code = AskCodebaseErrorCode.E10004
 
-    constructor(message: string) {
+    constructor(message: string = 'User is null') {
         super(ErrorUserNull.code, message);
     }
 }