application.conf

......

play.modules {
  # By default, Play will load any class called Module that is defined
  # in the root package (the "app" directory), or you can define them
  # explicitly below.
  # If there are any built-in modules that you want to disable, you can list them here.
  #enabled += my.application.Module

  # If there are any built-in modules that you want to disable, you can list them here.
  #disabled += ""
  enabled += "play.api.db.DBModule"
}

......

play.db {
  # The combination of these two settings results in "db.default" as the
  # default JDBC pool:
  config = "db"
  default = "default"

  # Play uses HikariCP as the default connection pool.  You can override
  # settings by changing the prototype:
  prototype {
    # Sets a fixed JDBC connection pool size of 50
    hikaricp.minimumIdle = 50
    hikaricp.maximumPoolSize = 50
  }
}
......

db {
  default.driver = com.mysql.jdbc.Driver
  default.url = "jdbc:mysql://localhost/bookstore"
  default.username = root
  default.password = "root"
}