fix(aws): aws caching fails if aws client is not initialised

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.09% :warning:

Comparison is base (0062d62) 25.79% compared to head (25ebf48) 25.70%. Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #178 +/- ## ========================================== - Coverage 25.79% 25.70% -0.09% ========================================== Files 14 14 Lines 597 599 +2 Branches 30 30 ========================================== Hits 154 154 - Misses 435 437 +2 Partials 8 8 ``` | [Files Changed](https://app.codecov.io/gh/snapshot-labs/pineapple/pull/178?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=snapshot-labs) | Coverage Δ | | |---|---|---| | [src/aws.ts](https://app.codecov.io/gh/snapshot-labs/pineapple/pull/178?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=snapshot-labs#diff-c3JjL2F3cy50cw==) | `0.00% <0.00%> (ø)` | |

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