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authentik/docs/flow/flows.md

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# Flows
Flows are a method of describing a sequence of stages. A stage represents a single verification or logic step. They are used to authenticate users, enroll them, and more.
Upon flow execution, a plan containing all stages is generated. This means that all attached policies are evaluated upon execution. This behaviour can be altered by enabling the `Re-evaluate Policies` option on the binding.
To determine which flow is linked, passbook searches all flows with the required designation and chooses the first instance the current user has access to.
## Permissions
Flows can have policies assigned to them. These policies determine if the current user is allowed to see and use this flow.
## Designation
Flows are designated for a single purpose. This designation changes when a flow is used. The following designations are available:
### Authentication
This is designates a flow to be used for authentication.
The authentication flow should always contain a `user_login` stage, which attaches the staged user to the current session.
### Invalidation
This designates a flow to be used to invalidate a session.
This stage should always contain a `user_logout` stage, which resets the current session.
### Enrollment
This designates a flow for enrollment. This flow can contain any amount of verification stages, such as email or captcha. At the end, to create the user, you can use the `user_write` stage, which either updates the currently staged user, or if none exists, creates a new one.
### Unenrollment
This designates a flow for unenrollment. This flow can contain any amount of verification stages, such as email or captcha. As a final stage, to delete the account, use the `user_delete` stage.
### Recovery
This designates a flow for recovery. This flow normally contains an `identification` stage to find the user. It can also contain any amount of verification stages, such as email or captcha.
Afterwards, use the `prompt` stage to ask the user for a new password and the `user_write` stage to update the password.
### Change Password
This designates a flow for password changes. This flow can contain any amount of verification stages, such as email or captcha.
Afterwards, use the `prompt` stage to ask the user for a new password and the `user_write` stage to update the password.