Dear, I wanted to introduce myself politely and provide more details but it seems that my previous post was too long or something.
Can you please suggest what I shall do to solve the error message in the title. It renders when I try to open the URL http://localhost/db_pathway/students/test of the beginners learning curriculum, right after configuring the database.php file and creating the table in mySQL. Thanks and regards

I tried:
1. changing the password to 'root' in phpMyAdmin
2. changing the password to 'something' in /config/database.php and to 'something' in phpMyAdmin
3. switching the $debug variable of /engine/Model.php back and forth between 'true' and 'false'
4. remove the password from database.php ('PASSWORD', '');
--> no effect. The only difference is that the action 4 resulted in a slightly different error message
SQLSTATE[HY000] [1045] Access denied for user '3306'@'localhost' (using password: NO)

There is no error in any of the /config/database.php or /config/Students.php files. I checked them 10 times.

Looks like a database error.
Whats the name of the database.
The user name should be 'root'.
password ''.

Thanks for your reply. Here below is the database.php file. The database created in phpMyAdmin is db_pathway. I tried already with an empty password [define('PASSWORD', '');] but the error remains.
//Database settings
define('HOST', '127.0.0.1');
define('USER', '3306');
define('PASSWORD', 'root');
define('DATABASE', 'db_pathway');

//Database settings -- Should be as follows:
define('HOST', '127.0.0.1');
define('PORT', '3306');
define('USER', 'root');
define('PASSWORD', '');
define('DATABASE', 'db_pathway');

Sorry for the bother... I skipped a line when copying this example, what a shame. It works now...
https://trongate.io/codelab/display/beginner/database_interaction/getting_started_with_the_db

Not a bother at all, I too am now learning Trongate and I make these type of mistakes all the time.
The Help Bar is exactly for users like us!

Cheers!

Thank you!