Zohoapis crm v2 current user profile info

Hello,

We are using Zohocrm api v2 for getting currently logged in user information geting.

but i getting the status code 401 Unauthorized.

{
    "code": "OAUTH_SCOPE_MISMATCH",
    "details": {},
    "message": "invalid oauth scope to access this URL",
    "status": "error"
}