✨ Admin profile validation (#1047)

* fix(QandA):input getting cleared and auto closing the pop after the submission

input should not get cleared if validaion is not matched and also question pop up should be closed if question is uploaded successfully

fix issue #977

* fix(admin profile): admin profile username validation fixed

in admin profile username was not letting enter username which contain numbers or underscore and was giving the validation error now it is fixed now it take both underscore and number also

fixes #1042

* Update Profile.jsx

* Update Profile.jsx  :  now username is displayed in profile

frontend/src/pages/Admin/Components/Profile/Profile.jsx

@@ -37,7 +37,7 @@ export function Profile(props) {
     lastName: Joi.string().regex(/^[A-Za-z]*$/).required().label("Last Name"),
     email: Joi.string().email().required().label("Email"),
     phone: Joi.string().regex(/[+]91[6-9]{1}[0-9]{9}$/).required().label("Contact Number"),
-    username: Joi.string().regex(/^[A-Za-z]+$/).required().label("Username")
+    username: Joi.string().regex(/^[A-Za-z][A-Za-z0-9_]{7,29}$/).required().label("Username")
   };
 
   const handleCloseToast = () => {
@@ -225,6 +225,7 @@ export function Profile(props) {
               <div className={style["name"]}>{name}</div>
               <div className={style["line"]}></div>
               <div className={style["contact"]}>
+                <div className={style["contact-details"]}>{username}</div>
                 <div className={style["contact-details"]}>{email}</div>
                 <div className={style["contact-details"]}>{phone}</div>
               </div>