async ORM with fastapi in mind and pydantic validation

 An async mini ORM for Python, with support for Postgres, MySQL, and SQLite.
 .
 The main benefits of using ormar are:
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   * getting an async ORM that can be used with async frameworks (fastapi,
     starlette etc.)
   * getting just one model to maintain - you don't have to maintain pydantic
     and other orm models (sqlalchemy, peewee, gino etc.)
 .
 The goal was to create a simple ORM that can be used directly (as request and
 response models) with fastapi that bases it's data validation on pydantic.