Allow creating new meals only to authenticated users.

[pyiotr]

Retrieving tokens functionality is already implemented.
See luncher.auth module for more details

Using '/auth/token/' you can retrieve a required token.

Acceptance criteria:

• Application should retrieve 401 unauthorized when authorization header is missing.
• Create unit and integration tests.
• You should create decorator @authorization_required to use in controller methods
• [optional] Token should be valid per only one hour.

In tests I prepared for you how valid request should work.