AuthResponse:
      type: object
      required:
        - user_phone
      properties:
        auth_hash:
          type: string
          x-go-type: null.String
          x-go-type-skip-optional-pointer: true
        user_phone:
          type: string
          pattern: ^\+(\d){5,25}$
          format: phone
          description: Phone number

type AuthResponse struct {
	AuthHash null.String `json:"auth_hash"`
	UserPhone string `json:"user_phone"`
}

type AuthResponse struct {
	AuthHash *null.String `json:"auth_hash"`
	UserPhone string `json:"user_phone"`
}