One of the missions that you can tackle early in Five Nights at Freddy's is 'Free Freddy'. This mission involves releasing Freddy from his room, which in order to do so requires obtaining a Freddy Photo Pass. This Where to Find a Freddy Photo Pass guide will point you in the right direction, as the precise location of this item is not indicated in-game.
Begin your search for a Freddy Photo Pass by positioning yourself in front of the door to Freddy's room. This is the door which can only be opened once you have acquired a Freddy Photo Pass. Turn around from this position and walk towards the large roll up door that can be found by in front of you and to the left. When you approach this door it will raise slightly allowing you to crawl through the gap. On the other side of the roll up door you will see a cutout of Freddy in an astronaut helmet pushed against the wall that is across the room. In front of this cutout is a present which you can interact with that reward you with the Freddy Photo Pass you have been searching for. All you need to do now is return to Freddy's room with it and you will be able to release Freddy.
Take a look at our Unlock Endings Guide to see the requirements in order to unlock the multiple endings in Five Nights at Freddy's: Security Breach.