[API] Fix bug and change limit 50 to 30

src/api/endpoints/i/update.js

@@ -25,6 +25,10 @@ module.exports = async (params, user, _, isSecure) =>
 	// Get 'name' parameter
 	const name = params.name;
 	if (name !== undefined && name !== null) {
+		if (typeof name != 'string') {
+			return rej('name must be a string');
+		}
+
 		if (!isValidName(name)) {
 			return rej('invalid name');
 		}

src/api/models/user.ts

@@ -16,7 +16,7 @@ export function validatePassword(password: string): boolean {
 }
 
 export function isValidName(name: string): boolean {
-	return typeof name == 'string' && name.length > 50 && name.trim() != '';
+	return typeof name == 'string' && name.length < 30 && name.trim() != '';
 }
 
 export function isValidBirthday(birthday: string): boolean {