app_basic.py

from flask import Flask, request, jsonify
from flask_jwt_extended import JWTManager, create_access_token, get_jwt_identity, jwt_required

app = Flask(__name__)
app.config["JWT_SECRET_KEY"] = "sec"

jwt = JWTManager()
jwt.init_app(app=app)

# Create a route to authenticate your users and return JWTs. The
# create_access_token() function is used to actually generate the JWT.
@app.route("/login", methods=["POST"])
def login():
    username = request.json.get("username", None)
    password = request.json.get("password", None)

    if username != "test" or password != "test":
        return jsonify({"msg": "Bad username or password"}), 401
    
    access_token = create_access_token(identity=username)
    return jsonify(access_token=access_token)

@app.route("/protected", methods=["GET"])
@jwt_required()
def protected():
    current_user = get_jwt_identity()
    print(current_user)
    return jsonify(logged_in_as=current_user), 200

if __name__ == "__main__":
    app.run(debug=True)