As a admin I need to be able to modify events so that I can correct upcoming events

[mmanning95]

As a admin I need to be able to modify events So that I can correct upcoming events

Details and Assumptions

• The admin needs to be able to remove old events that have passed. They also need to be able to modify events in the case that there are changes

Acceptance Criteria

Scenario: Successful event modification
Given I am a logged-in admin
And I click the "edit event" button
And I am redirected to the Edit Event page
When I change the flyer, name, date, or contact information
And I click the "save changes" button
Then I will be redirected to the event's page 
And I will see a message saying the changes have been saved

Scenario: Unsuccessful event modification due to unsupported file format
Given I am a logged-in admin
And I click the "edit event" button
And I am redirected to the Edit Event page
When I change the flyer to an unsupported format
And I click the "save changes" button
Then the page will be reloaded 
And I will see a message saying that the changes have failed to save due to the wrong flyer format