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Para fazer essa operação o usuário deverá ter um token, ou seja, deverá estar autenticado.\n\n### Validações:\n\n1 - Se o req.body no momento do cadastro estiver vazio enviar o status 400\n\n2 - Se o user já existir no array de contas no momento do cadastro, então, enviará o status 409\n\n3 - ao autenticar, o token deverá ser salvo dentro do array de contas, em um campo token = [].\n\n3 - Se não houver o token no headers com o nome 'authentication-headers' no momento da transferência entre contas, então, deverá enviar o status 401\n\n4 - Para todos os elementos que terminarem com sucesso o que é previsto em seu endpoint deverá enviar o status 200\n\\*Há outras validações que estão implicítas e podem ser feitas\n\n```javascript\nExemplo de um objeto a ser salvo em contas = []:\n\nconst contas = [\n{ numero: 12345, saldo: 1000, user: jorge},\n{ numero: 54321, saldo: 500, user: maria },\n{ numero: 98765, saldo: 2500, user: teresa },\n];\n```\n\nSUA TAREFA É VERIFICAR O QUE O CÓDIGO ATUAL JÁ FAZ E ENTÃO ACRESCENTAR AS OUTRAS REGRAS RESTANTES\n\n---\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fluizcalaca%2Fbackend-challenge-bank-api","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fluizcalaca%2Fbackend-challenge-bank-api","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fluizcalaca%2Fbackend-challenge-bank-api/lists"}