public JdbiGenericExtension withCredentials(String user, String password) {
        this.user = user;
        this.password = password;

        return this;
    }
Sets the username and password.

@param user     The username. Can be null.
@param password The password. Can be null.
@return This object.
testing/src/main/java/org/jdbi/v3/testing/junit5/JdbiGenericExtension.java