function init(

) {
// code to initialize the program
}

function login(username, password) {
// code to check if username and password match a user in the database
// if they match, return true and set the user as logged in
// if they don't match, return false and display an error message
}

function logout() {
// code to log out the current user
}

function getUserInfo(userId) {
// code to retrieve user information from the database based on userId
// return the user information as an object
}

function updateUser(userId, updatedUserInfo) {
// code to update user information in the database based on userId
// updatedUserInfo is an object containing the updated information
// return true if the update was successful, false otherwise
}

function deleteUser(userId) {
// code to delete a user from the database based on userId
// return true if the deletion was successful, false otherwise
}

// additional functions can be added as needed for the specific program being developed