del in for loop not deleting everything

[noswad]

My problem is that I want to use del in a for loop to delete everything in a list.

Code:

users = ['a', 'b', 'c', 'd', 'e']

for user in users:
    del users[0]
 
print(users)

However, this deletes everything except the last 2 values.
I am a beginner and learning. Please explain why this is happening. Thank you