# Identity Validation You can allow users from a selected domain or you can configure your API to allow only valid users. Once the API returns userExists":"true" for the requested id, e.g. for email "id":"" or for phone "id":"9196576XXXX". If the user exists he will be allowed to Login to your application. ![](/files/hQmtpo42Tlv6up4bQeWC) ``` [{"emailID":"james@gmail.com","userExists":"true","additionalInfo":{"group":"core","role":"admin"},"id":"james@gmail.com"}, ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.secuuth.io/setup-configuration/identity-validation.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.