How to split value in single quotes after specific string

[Mathkar_kunal]

i have entioned

same like below one by on e error i am getting in loop

error 1] Cannot add user. ‘ABC’ does not exist, user is already a member of ‘Test_abc’ group
error 2] Cannot add user. ‘PQR’ does not exist

expected output

1] ABC
2] PQR