Try the theme.authButtons
option, like this:
var options = {
[...] // other Lock options
theme: {
authButtons: {
"connectionName": {
displayName: "Click me!",
primaryColor: "#eb5424",
foregroundColor: "#FFFFFF",
icon: "https://.../logo.png"
}
}
}
};
More info: GitHub - auth0/lock: Auth0's signin solution and Lock UI Customization