How to enabled PR autocomplete to rebase?

With the new option in PullRequest to rebase code to merge, how to enabled PR with autocomplete in vsts code cli to "rebase" automacatilly in complete pull request?

thanks!

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#### Document Details

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* ID: 71a706a5-ff44-04ba-20ef-2c1b04591983
* Version Independent ID: fadbcf7c-badd-d820-2c83-c2af09218966
* Content: [vsts code pr](https://docs.microsoft.com/en-us/cli/vsts/code/pr?view=vsts-cli-latest#feedback)
* Content Source: [src/command_modules/vsts-cli-code/vsts/cli/code/_help.py](https://github.com/Microsoft/vsts-cli/blob/master/src/command_modules/vsts-cli-code/vsts/cli/code/_help.py)
* Product: **devops**
* GitHub Login: @elbatk
* Microsoft Alias: **elbatk**