Source code hangs while sending auth data to connect to MySQL database

[PsySc0rpi0n]

Hello. First of all, I'm not versed in MySQL databases and I'm trying to connect to one for the very first time, so, I'm completely unaware of MySQL settings.

Ok, so I have a Windows machine with the SQL database and MySQL Workbench 8.0. The database have 1 table with 1 row only, just for testing purposes.
Then, I have my laptop, running Debian and I can connect from this laptop to the Windows machine (where the database is) using mysql command line tool, either using root or the user I have created like so, in MySQL workbench 8.0:

CREATE USER 'testuser'@'%' IDENTIFIED BY 'randompasswd';
GRANT ALL PRIVILEGES on mydatabase.* TO 'testuser'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;

The code I'm using in my device (LilyGo T-SIM7600X) is this:
https://pastebin.com/HBY6EUxp

The issue is that the connection to the databasenever happens, or at least the insertion of the data is never inserted into the database.
So, I went a bit deeper and started to add that known macro that tells us the line of code where the macro is used in the source code of the library MySQL_Connection.cpp to see where the code would hang and I came to the conclusion that the code hangs here:

MySQL_Connector_Arduino/src/MySQL_Connection.cpp

Line 87 in 067b345

send_authentication_packet(user, password, db);

So, this must be something related with authentication, although I can connect to the database using mysql command line tool from my laptop.

So, I need some help to try to figure out what may be wrong with the code or the authentication or maybe something wrong with the database settings/permissions
The part of the library source code I added the GOT_HERE(); macro is this (MySQL_Connection.cpp):

while (retries--)
 {
 Serial.println("...trying...");
 Serial.print("Attempt: ");
 Serial.println(retries);
 connected = client->connect(server, port);
 GOT_HERE(); // We do reach here
 if (connected != SUCCESS) {
 GOT_HERE(); // We do not reach here
 Serial.print("...got: ");
 Serial.print(connected);
 Serial.println(" retrying...");
 delay(CONNECT_DELAY_MS);
 } else {
 GOT_HERE(); // We do reach here
 break;
 }
 }

 if (connected != SUCCESS){
 GOT_HERE(); // We do not reach here
 return false;
 }
 
 GOT_HERE(); // We do reach here
 read_packet();
 GOT_HERE(); // We do reach here
 parse_handshake_packet();
 GOT_HERE();
 Serial.print("User: "), Serial.println(user);
 Serial.print("Passwd: "), Serial.println(password);
 Serial.print("DB: "), Serial.println(db);
 send_authentication_packet(user, password, db);
 GOT_HERE(); // We do not reach here
 read_packet();
 GOT_HERE(); // We do not reach here
 if (get_packet_type() != MYSQL_OK_PACKET) {
 parse_error_packet();
 return false;
 }

I commented where the code reaches and where the code does not reach the macro and also added a couple of Serial.println() lines
Serial Monitor shows this:

Any thing else I can do to try to figure out what the problem is?