:sparkles: Add custom func for casbin validate

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.35 :tada:

Comparison is base (136cdda) 68.63% compared to head (91322c0) 68.98%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #116 +/- ## ========================================== + Coverage 68.63% 68.98% +0.35% ========================================== Files 90 90 Lines 3950 3995 +45 ========================================== + Hits 2711 2756 +45 Misses 1076 1076 Partials 163 163 ``` | Flag | Coverage Δ | | |---|---|---| | unit-test-mysql | `68.98% <100.00%> (+0.35%)` | :arrow_up: | | unit-test-postgresql | `68.98% <100.00%> (+0.35%)` | :arrow_up: | | unit-test-sqlite3 | `68.98% <100.00%> (+0.35%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ximager#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://app.codecov.io/gh/ximager/ximager/pull/116?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ximager) | Coverage Δ | | |---|---|---| | [pkg/dal/auth.go](https://app.codecov.io/gh/ximager/ximager/pull/116?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ximager#diff-cGtnL2RhbC9hdXRoLmdv) | `84.74% <100.00%> (+44.74%)` | :arrow_up: | | [pkg/handlers/distribution/upload/handler.go](https://app.codecov.io/gh/ximager/ximager/pull/116?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ximager#diff-cGtnL2hhbmRsZXJzL2Rpc3RyaWJ1dGlvbi91cGxvYWQvaGFuZGxlci5nbw==) | `61.53% <100.00%> (+1.01%)` | :arrow_up: |

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