publish token

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타인의 무분별한 사용을 막기위해서 token 발행을 도입.

**Describe the solution you'd like**
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token발행을 할지 안할지 정할 수 있게하고 발행을 한다면은 POST요청 받을때 token 체크를 수행.

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**Additional context**
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The issue describes adding token-based authentication to prevent unauthorized use, but does not specify where in the codebase to start. Look for the POST request handler in the backend, likely in a route file. Research how token generation and validation are implemented in similar projects. Determine what 'done' looks like by checking if a token can be issued and validated on POST requests.

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