Add method to view current state without applying change

Current invocation is account_manager.py $user $state to change $user to $state.

Intuitively I would expect account_manager.py $user to return the current of $user without making changes. This is not currently the case, and it would be helpful to have this functionality for verifying state of users.

This may be related to #158

added Backlog label

This would be great to implement in the account_manager.py script. In the meantime, if anyone needs to check account state, they can add the following bash function to their .bashrc.

function slurm-acct-state() {
  # Check if the account name is provided
  if [ -z "$1" ]; then
    echo "Usage: slurm-acct-state <account>"
    return 1
  fi

  # Assign the first positional argument to a variable
  account="$1"

  # Use the account name to query the SQLite database
  sqlite3 /data/rc/rabbitmq_agents/.agent_db/user_reg.db "SELECT * FROM user_state WHERE username = '$account';"
}

This will print out all recent accounting changes for the given user. Their current state is in the last row