Here is the method to see how to create database in mysql and used in flask
CREATE TABLE user (
userid int(11) NOT NULL AUTO_INCREMENT,
name varchar(100) NOT NULL,
email varchar(100) NOT NULL,
password varchar(255) NOT NULL,
PRIMARY_KEY (userid)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
because of the table user is created now insert some values if u want and for that use the following code:
INSERT INTO user (name, email, password) VALUES ('your name','your email', 'your password');