Add start of ui authentication to app#10

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JIntrocaso wants to merge 4 commits intodevelfrom

Commits on May 17, 2020

Added buttons to advance stepper; small styling updates
JIntrocaso
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Commits on May 22, 2020

added vscode settings.json to gitignore
JIntrocaso
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Commits on Jun 9, 2020

added amplify and cognito authentication to UI project
JIntrocaso
committed

Commits on Jun 14, 2020

Added custom authentication components for UI
JIntrocaso
committed