actually it is not clear to me on which way you try to install i-doit. If you are using the default "install" command provided by "console.php" the issue that no persons are created is unknown to me.
But there is known problem regarding the "install"-script placed in "setup/install.sh" which is not able to create such users because of a bug. We are currently working on this topic.
Until a solution you can use "console.php install" instead.
Unfortunately i think you have a typo in your mysql password for the "root" user. Please try to login via the mysql client directly and ensure that the password is correct:
mysql -u root -p[YOUR_PASSWORD_WITHOUT_A_SPACE_AFTER_P_OPTION]