![]() ![]() You must protect the security of your users by preventing request forgery attacks. Obtain user information from the ID token.Exchange code for access token and ID token.Send an authentication request to Google.When a user tries to log in with Google, you need to: If you need to implement an implicit flow, we highly recommend usingĪPI Console to enable it to use these protocols andĪuthenticate your users. Implicit flow is significantly more complicated because of security risks in handling and using This document describes how to perform the server flow for authenticating the user. Implicit flow is used when a client-side application (typically a JavaScript app running in theīrowser) needs to access APIs directly instead of via its back-end server. The server flow allows the back-end server ofĪn application to verify the identity of the person using a browser or mobile device. The most commonly used approaches for authenticating a user and obtaining an ID token areĬalled the "server" flow and the "implicit" flow. Sharing identity assertions on the Internet. ![]() Authenticating the userĪuthenticating the user involves obtaining an ID token and validating it. Which describes the HTTP request flows that underly the available libraries. If you choose not to use a library, follow the instructions in the remainder of this document, Well-debugged code written by others is generally a best practice. Note: Given the security implications of getting the implementationĬorrect, we strongly encourage you to take advantage of a pre-written library orĪuthenticating users properly is important to their and your safety and security, and using Google client libraries, which are available for a variety of Implementation details of authenticating users and gaining access to Google APIs. Google and third parties provide libraries that you can use to take care of many of the So it does not include branding information that would be set in the Google Drive scopes are present in the request. The following consent dialog shows what a user would see when a combination of OAuth 2.0 and If prompted, select a project, or create a new one.You control the branding information in the ![]() The user consent screen also presents branding information such as your product name, logo, andĪ homepage URL. You can also use scopes to request access Scope parameter, which your app includes in itsĪuthentication request. You request access to this information using the The user logs in, they might be asked to give your app access to their email address and basicĪccount information. Customize the user consent screenįor your users, the OAuth 2.0 authentication experience includes a consent screen thatĭescribes the information that the user is releasing and the terms that apply. If there is no OAuth 2.0 client IDs section on the Credentials page, then your project has
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