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Create a Gel Cloud secret key from the Gel Cloud CLI docs. The connection docs state that to authenticate with a Gel Cloud instance you provide the instance name and a secret key; the Cloud docs also say you can generate a secret key in the Cloud UI or by running gel cloud secretkey create.

Create or set a database role password on your Gel instance. The docs note Gel creates an admin user by default with a randomized password, and you can set one with alter role admin { set password := '<password>'; }; or create a new role with create superuser role <name> { set password := '<password>'; };. For linked or local instances, the CLI can also save these credentials locally as described in Connection parameters.

Configure your Gel instance to use cfg::JWT for the SIMPLE_HTTP transport as described in EdgeQL over HTTP. Then mint a JWT for a Gel database user according to your instance's JWT configuration. Requests must include Authorization: Bearer <token> and X-EdgeDB-User: <gel-username>.