There are two different sites with linear score info on them- Adgagenetics and adga.org.
Adgagenetics has the USDA public information, like pedigree, milk records, and raw linear data. It also has SG/SGCH, since the SG award is based on PTI scores calculated by the USDA. Adgagenetics is not a part of ADGA, but privately maintained with USDA info by Gene Dershowitz of Missdee's Alpines.
Adga.org has the awards given by ADGA- CH, GCH, *M and +*B, Top Ten,
National Chs, and final linear scores. This information is accessible by ADGA members only. Members can register & then access this information via the portal on the right upper corner of the ADGA home page.
So if you'd like to get final scores, you'll have to go through the ADGA.org site. It's not possible to figure out the final LA score from the raw data- there's a bunch of other stuff that goes into the FS.
Hoofinit- ADGA doesn't seem to have Nigie pedigrees beyond the double registered AGS/ADGA individuals. The USDA-AIPL doesn't have ND milk records either. And there won't be SG Nigerians until there is enough milk & linear data to determine which ones are actually "superior".