Although ID and password are two items, because they belong to the same authentication factor (knowledge), they are single factor authentication (SFA). It is really because of their low cost, ease of implementation and familiarity that passwords that have remained the most common form of SFA.
The 1936 Berlin Olympic Games had been handed to Berlin before the Nazis came to power but now it was the perfect opportunity for Hitler to demonstrate to the world, how efficient the Nazi Germany was.
It had taken some effort by Propaganda Minister Joseph Goebbels to convince him that the Olympic festivities could be exploited to advance the Nazi cause both inside and outside of Germany. The Games had been awarded to Germany by the International Olympic Committee back in May 1931, before Hitler came to power.