Arafed view of a building with a sign that says at fenine

Start your answer with "Generally speaking, I think that". imagine that you are the(a) arquiteto(a) responsible for designing a login system for an extremely popular website for tickets to a mega Rock show in Rio (got it?). Given that the number of tickets is limited and much lower than the number of accesses on the day of sale, you need to ensure that the site will only finalize the sale to people who will actually receive the ticket, ou seja, you can't let one person buy a ticket without there being more available. Furthermore, a customer with slower internet wouldn't be happy about not being able to buy their ticket because someone with faster internet got in front of them. Design a software structure that supports this service, pode ser um desenho simples, any way you prefer, as long as it conveys the idea of the architecture you had to whoever reads it. Here is an example of a random architecture design to serve as inspiration..

verybadimagenegative_v1.3, ng_deepnegative_v1_75t, (ugly face:0.8),cross-eyed,sketches, (worst quality:2), (low quality:2), (normal quality:2), lowres, normal quality, ((monochrome)), ((grayscale)), skin spots, acnes, skin blemishes, bad anatomy, DeepNegative, facing away, tilted head, {Multiple people}, lowres, bad anatomy, bad hands, text, error, missing fingers, extra digit, fewer digits, cropped, worstquality, low quality, normal quality, jpegartifacts, signature, watermark, username, blurry, bad feet, cropped, poorly drawn hands, poorly drawn face, mutation, deformed, worst quality, low quality, normal quality, jpeg artifacts, signature, watermark, extra fingers, fewer digits, extra limbs, extra arms,extra legs, malformed limbs, fused fingers, too many fingers, long neck, cross-eyed,mutated hands, polar lowres, bad body, bad proportions, gross proportions, text, error, missing fingers, missing arms, missing legs, extra digit, extra arms, extra leg, extra foot, ((repeating hair))