Formatting column to hide button based on created by or author

[GCGJH]

Hi I'm trying to format a column so that a Submit button that triggers a flow is to be only visible for the person who created the item. 

Columns real names are Submit and Author

Submit is Single line of text column.

Author is a Person or Group column.

I know I have to added a visibility line to the formatting but I'm not sure what to put.

I tried "visibility": "=if(((indexOf([$Author],'[Me]')) == 0),'hidden', 'visible')" but it didn't work.

Any help is appreciated!

[#2]

@GCGJH this should work:

"display": "=if([$Author.email]==@me, 'visible','hidden')"

[#3]

@GCGJH Try adding below inside style:

"display": "=if([$Author.email]==@me,'block','none')"

OR 

"visibility": "=if([$Author.email]==@me,'visible','hidden')"

Where Author is the internal name of your SharePoint person column. You can get the internal name of your columns by following this article: How to find the Internal name of columns in SharePoint Online 

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