I have entered four names here.
I typed '1' in the first box to bring up 'Ian Mitchell';
To bring up 'Michael Clark', I typed in his EBU number;
I typed in the other two names in full. Note that if you just use small letters, EBUSCore will correct this to 'Proper Case' if you have the box ticked at the top.
Note the different shadings.
Ian Mitchell has no shading, as he is a club member.
When I add Michael Clark using his EBU number, he automatically gets added to the player database, but is recorded as a non-member of the club.
The other two players are not recorded on the database, and so are shaded in yellow. I can add them to the player database by clicking on the button circled in red. As part of the process, you have the option to try to identify them from the EBU's database of current members. (But if they are lapsed members, or not a full member for some other reason, the search won't find them).