code: def update_user(options={})
        user=User.new(options)
        user.validate!
        response=oauth_access_token.put("/v1/users/#{user.id}", body: user_hash(user.to_hash))
        User.new(response.parsed)
      end
docs: Update an existing user
   @param [Hash] options
   @option options [String] :email The new user's email address
   @option options [String] :password The new user's password
   @option options [String] :password_confirmation The new user's password confirmation string
   @return [G5AuthenticationClient::User]