改进了 validate_user 函数的实现

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+#### Erase this before submission ####
+- Consider only new features (aka functional enhancements, new localizations, UX improvments). Specific bug reports or support requests should be opened through  [the OVHcloud help center](https://help.ovhcloud.com/en-ie/ "the OVHcloud help center")
+- If you believe you've found a security issue in our service, please enter our [bug bounty programm ](https://yeswehack.com/programs/ovh#rules "bug bounty programm ")
+- Please consult [Existing issues](https://github.com/ovh/public-cloud-roadmap/issues "Existing issues") and [product documentation](https://help.ovhcloud.com/csm/en-gb-documentation?id=kb_home "product documentation") to avoid duplicates
+- Please describe the feature in the shortest possible way, ideally as an agile user story.
+- We are interested in your use case associated and the current workaround you have found if they exist. Please comment your own issue with those details if possible.
+#### Erase this before submission ####
+
+As an OVHcloud customer using **[required existing product, or jsut public cloud in general]**
+I want **[this product or a new/other one]** to **[new feature or localisation]**
+so that **[this new use case(s) you can achieve]**
+
+Column1 | Column2
+-- | --
+Value1 | Value2
+Value3 | Value4
+etc | ...