This is unlocked in the Pro Career mode.
After creating your character with the very basic customisation options, you will enter a small tournament which, you must finish in the top 50. The tournament is played at TPC Sawgrass.
It is over four rounds but, not the full 18 holes. In each round, you will play 5 or 6 holes with the game simulating your score on the other holes based on how you played the few holes that round. I finished in the top 10 with a few very badly played shots and, TBH, I don't think this can be failed as, it grants you your licence to enter the later career modes competitions.
Also, a point to mention is, not all four rounds need to be played in one go although, it does only take about 30/40 minutes to complete (*depending on how long you spend lining up your shot) is that it saves your progress after each round. You can therefore stop and continue at a later time.