you can create an account if you have ( a ) a pre-existing google account ; ( b ) a pre-existing pokémon trainer club ( `` ptc '' ) account ; ( c ) a pre-existing account with facebook , or ( d ) such other pre-existing third-party accounts as we may choose to support in the future ( notification of which will be provided by allowing selection of such pre-existing accounts on the relevant account-creation screen ) . 
