post:
  tags: [Auth]
  summary: Sign in with NIP-98 (returns JWT)
  security:
    - NIP98: []
  responses:
    "200":
      description: Token and pubkey
      content:
        application/json:
          schema:
            type: object
            properties:
              token:
                type: string
              pubkey:
                type: string
              method:
                type: string
                example: nip98