Locked out of my Samsung Galaxy Player 5.0 I have been locked out of my Galaxy Player. When I clicked on "forgot password" it told me to log in to my Google Play account. I forgot my password to it too. I need help to figure out how to change my password to it.
Is your phone rooted? If yes,  then


Power off your phone. Wait for 5 minutes (till it vibrates to indicate it's switched off completely or just remove the battery) 
Press volume down+power button+home button (to boot it to bootloader)
It will ask your warranty is void bla bla bla., just click okay
Now navigate the menu with volume up (to go one level up) volume down (to one level down) and power button (to select)
There must be some wipe dat/factory reset
If yes then select it and wipe all - all yes' and okays' (it will not clear your media inside the internal sd)
When it finishes go back to menu and click reboot 


And check if your password has been set to slide unlock

Checked and verified on many Samsung devices and other phone out in India.