feat: sensical user invitation

Users can now be invited to an org by email.

"Email" for now is "print to stdout"

Resolves #12

src/utils.py

@@ -0,0 +1,27 @@
+from joserfc import jwt, jwk, errors
+
+from auth.exceptions import UnauthorizedException
+from src.config import settings
+
+
+KEY = jwk.import_key(settings.SECRET_KEY.get_secret_value(), "oct")
+
+
+async def generate_jwt(claims):
+	jwt_token = jwt.encode(header={"alg": "HS256"}, key=KEY, claims=claims)
+
+	return jwt_token
+
+
+async def decode_jwt(encoded):
+	try:
+		token = jwt.decode(encoded, key=KEY)
+		return token.claims
+	except errors.DecodeError:
+		raise UnauthorizedException("Invalid JWS")
+
+
+async def send_email(recipient: str, subject: str, body: str):
+	print(recipient)
+	print(subject)
+	print(body)