CREATE TABLE Users (
    UserID int AUTO_INCREMENT,
    Name varchar(200) NOT NULL,
    Email varchar(200),
    Username varchar(200) NOT NULL,
    Password text NOT NULL,
    Created datetime,
    Updated datetime,
    PRIMARY KEY (UserID)
);

CREATE TABLE UsersAccessLevels (
    UsersAccessLevelID int AUTO_INCREMENT,
    LevelName varchar(100) NOT NULL,
    AccessDescription text,
    PRIMARY KEY (UsersAccessLevelID)
);

CREATE TABLE UsersAccessMapping (
    UsersAccessMappingID int AUTO_INCREMENT,
    UserID int NOT NULL,
    UsersAccessLevelID int NOT NULL,
    PRIMARY KEY (UsersAccessMappingID)
    CONSTRAINT fk_useraccess FOREIGN KEY (UserID)
        REFERENCES Users(UserID) ON DELETE CASCADE
    CONSTRAINT fk_useraccess_level FOREIGN KEY (UsersAccessLevelID)
        REFERENCES UsersAccessLevels(UsersAccessLevelID) ON DELETE CASCADE
);

from app import db


class Users(db.Model):
    """All users' information is stored here"""
    __tablename__ = "Users"
    UserID = db.Column(db.Integer(), primary_key=True)
    Name = db.Column(db.String(200), nullable=False)
    Email = db.Column(db.String(200))
    Username = db.Column(db.String(200), nullable=False)
    Password = db.Column(db.Text, nullable=False)
    Created = db.Column(db.DateTime)
    Updated = db.Column(db.DateTime)


class UsersAccessLevels(db.Model):
    """This defines the various access levels users can have"""
    __tablename__ = "UsersAccessLevels"
    UsersAccessLevelID = db.Column(db.Integer, primary_key=True)
    LevelName = db.Column(db.String(100), nullable=False)
    AccessDescription = db.Column(db.Text)


class UsersAccessMapping(db.Model):
    """Each users' access level is defined here"""
    __tablename__ = "UsersAccessMapping"
    UsersAccessMappingID = db.Column(db.Integer, primary_key=True)
    UserID = db.Column(db.Integer, nullable=False)
    UsersAccessLevelID = db.Column(db.Integer, nullable=False)
    __table_args__ = (
        db.ForeignKeyConstraint(
            ["fk_useraccess", "fk_useraccess_level"],
            ["Users.UserID", "UsersAccessLevels.UsersAccessLevelID"],
            ondelete="CASCADE"
        )
    )

File "/srv/vortech-backend/venv/lib/python3.5/site-packages/sqlalchemy/ext/declarative/base.py", line 196, in _scan_attributes
    "__table_args__ value must be a tuple, "
sqlalchemy.exc.ArgumentError: __table_args__ value must be a tuple, dict, or None