code: def find_user_by_email(email)
        response = oauth_access_token.get('/v1/users', params: { email: email })
        user = response.parsed.first
        if user
          user=User.new(user)
        end
        user
      end
docs: Find a user by email
   @param [String] email address
   @return [G5AuthenticationClient::User]