Creates new connections and registers them in the manager.
If connection options were not specified, then it will try to create connection automatically,
based on content of ormconfig (json/js/env) file or environment variables.
All connections from the ormconfig will be created.
Creates new connections and registers them in the manager.
If connection options were not specified, then it will try to create connection automatically, based on content of ormconfig (json/js/env) file or environment variables. All connections from the ormconfig will be created.