auth_method: odbc
odbc_type: mysql
odbc_server: "localhost"
odbc_database: "ejabberd"
odbc_username: "ejabberd"
odbc_password: "password"
##
## If you want to specify the port:
odbc_port: 3306

[critical] <0.38.0>@ejabberd:exit_or_halt:133 failed to start application 'p1_mysql': {error,
                                         {"no such file or directory",
                                          "p1_mysql.app"}}

$ ./configure --enable-mysql
$ make
$ cp deps/p1_mysql/ebin/* /path/to/running/ejabberd/ebin/

sudo apt install erlang-p1-mysql