Assign a role to a specific user.
assignedRole - An object that contains the information about the role. The payload is defined below.
role - The role that will be assigned (accepts either the role id or the role key).
tenant - The tenant the role is associated with (accepts either the tenant id or the tenant key).
user - The user the role will be assigned to (accepts either the user id or the user key).
const response = await permit.api.assignRole(JSON.stringify(assignedRole));