> ## Documentation Index
> Fetch the complete documentation index at: https://voucherify-pw-further-tests.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Assign User

> Assigns a user to a given project. The user must be an existing user in Voucherify.

> 🚧 Correct Use of Data
>
>To avoid errors, use the `"role"` key with either `"id"` or `"login"` keys.