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You will start at the API credentials manager:\\
[https://console.developers.google.com/projectselector/apis/credentials]\\
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You first need to make a project.  My example calls this CrushFTP-Test.\\
[attachments|gDriveSetup/create_project.png]\\
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Next select create credentials, and choose the Web Application type.\\
[attachments|gDriveSetup/create_credentials.png]\\
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[attachments|gDriveSetup/oauth_consent.png]\\
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Configure the __Authorized JavaScript origins__. Like __protocol://dns_or_ip:port__. Without a trailing slash or it will complain.\\
Provide the __Redirect URL__ too. The location where Google sends back the Id token (Id Token : That will be used for the authentication of the google user).\\
[attachments|CrushOAuth/g_sign_origin_redirect_url.png]\\
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Copy the __Client ID__ that will be required to integrate the __Google Sing-In__ Button.\\
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__Integrate Google Sign-In button__\\
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[attachments|CrushOAuth/gsign_in_button.png]\\
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Go to the __Preferences-> Ip/Servers__ and select the __HTTP__ or __HTTPS__ port item(__OAuth Sign in__ Tab) where you want to enable the Google Sing-In button. Check the __"Enable Google Sign in"__ flag and provide the __Client ID__ of you Google project(mentioned above).\\
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[attachments|CrushOAuth/port_item_settings.png]\\
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Continue on: [CrushOAuth]\\
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