connecting to mysql

[yamakenji24]

implementation list

• [x] connect to mysql
• [x] encode jwt by bcrypt password
• [x] decode jwt and search user

What i did in this PR

Mysql Connection

• connect to mysql in db.py
• connections requires some config data, which can be used from env or by default.

Password encoding and JWT

• changed using fake information to DB data
• jwt is created by RS256, which key is generated from pem(secret)
  • directions to the pem file can be defined from env, or by default

demo

Authorization

• authorize user from jwt
• return user information if jwt is as expected

  demo