I am putting accounts in a code block so to not ping ~75 people on one PR:

• @34j: Initial commit in Simplify colored_line() implementation in Multicolored lines example #29954 with proton email, followups committed on GitHub, using masked email. Canonicalized to proton email.
• @AMAN194701: commits locally had Title Case name, on GitHub used UPPER CASE.
• @AasmaGupta: Some invalid email from local config. Canonicalized to gmail.
• @AdamOrmondroyd: commits locally were gmail, on GitHub used the masked email.
• @AndrGutierrez: there were two emails and two names (but I think one was a misspelling). Canonicalized on the one that was known to GitHub last (i.e., used for the squash merge.)
• @AnnaMastori: Just a minor spacing error, went with the name as in profile.
• @Atharva2012: this was a typo: DOC: Add axis sharing section to subplot_mosaic guide #31720 (comment)
• @Cemonix: all the name, email, and masked email came in via DOC: correctly specify return type of figaspect #29545.
• @Chirag3841: the squash merge appears to have used the masked email, but all the commits used gmail.
• @CouldNot: commits locally were gmail, on GitHub used the masked email.
• @DerWeh: the latter email is the second commit of DOC: correctly specify return type of figaspect #29545 (along with a full name), but it is not linked to the GitHub account, so I assume the former is preferred now (and recent activity has not used the full name either, nor does the profile show one, so I won't add it here.)
• @Dusch4593: Two names for same email. Canonicalized on GitHub profile name.
• @GameRoMan: Used the name as given in the profile.
• @Impaler343: commits locally were gmail, on GitHub used the masked email.
• @Jacob-Stevens-Haas: Two names for same email. Canonicalized on GitHub profile name.
• @Kaustbh: commits locally were gmail, on GitHub used the masked email.
• @Khushikela29: commits locally were gmail, on GitHub used the masked email.
• @Logan-Pageler: commits locally were gmail, on GitHub used the masked email.
• @OdileVidrine: commits locally were gatech, on GitHub used the masked email.
• @ZPyrolink: commits locally were gmail, on GitHub used the masked email.
• @aditya-singh597: One email used locally, but a different one for the profile. Canonicalized on the profile one?
• @agautam478: commits locally were uber, on GitHub used the masked email.
• @albus-droid: commits had a mix of name/username for name. Canonicalized on GitHub name in profile.
• @alphanoobie: commits locally were gmail, on GitHub used the masked email.
• @amishamehta99: DOC: make nightly download command one line so it works on Windows #31231 and DOC: Fix rendering of quiver documentation #31252 are Name ; not sure where the masked email came from, but it is linked to the email on GitHub.
• @ananya314: commits locally were gmail, on GitHub used the masked email.
• @andrew-fennell: two emails, but both are linked to GitHub. Canonicalized on the one used in all commits but one.
• @aseriesof-tubes: The email is invalid, and I can't find any other commits here, so I used the GitHub masked email for the user from the PR that introduced it.
• @beelauuu: commits locally were .edu, on GitHub used the masked email.
• @buddy0452004: Used the name as given in the profile.
• @chahak13: both emails are linked to GitHub, but went with the one used more often.
• @chaoyihu: commits locally were gmail, on GitHub used the masked email.
• @ckcherry23: commits locally were gmail, on GitHub used the masked email.
• @devRD: Two names for same email. Canonicalized on GitHub profile name.
• @dkweiss31: Original commit in Update secondary_axis tutorial #29073 uses the .edu email and all subsequent commits were using GitHub suggestions, so used the masked email.
• @dmatos2012: commits locally used two emails used, on GitHub used the masked email. Canonicalized on the most used email.
• @esibinga: commits locally were gmail, on GitHub used the masked email.
• @greglucas: Canonicalized on the more recent email.
• @hasanrashid: commits locally were gmail, on GitHub used the masked email.
• @impact27: commits locally were ac.uk, on GitHub used the masked email.
• @jayaprajapatii: Just a minor spacing error, went with name as in profile.
• @joddeepesh-cloud: Two names for same email. Canonicalized on the GitHub profile name.
• @juanis2112: Two names for same email. Canonicalized on GitHub profile name.
• @konmenel: commits locally were gmail (with a mix of full name or username as name), on GitHub used the masked email.
• @kyracho: both emails are linked to the GitHub account, but the one I used here is the one in the profile.
• @lukashergt: both emails are linked to the GitHub account, but the one I used here is the one in the profile.
• @mathause: commits locally were ethz, on GitHub used the masked email.
• @meeseeksmachine: Renamed, so set to new name.
• @melissawm: A few mixed names/emails, so canonicalize on the current one.
• @mhvk: Went with the name in the latest commit, though the GitHub profile doesn't have a middle name at all, so unsure about this one.
• @miriamsimone: Multiple names for the single email; went with the full name.
• @mkrake: commits locally were gmail, on GitHub used the masked email; also the username changed.
• @n-takumasa: Three names for same email. Canonicalized on latest name.
• @nrnavaneet: commits locally were gmail, on GitHub (either suggestions or squash merges) used the masked email.
• @pedrom2002: Canonicalized on name from profile.
• @pedrompecanha: commits locally were gmail, on GitHub used the masked email.
• @photoniker: commits locally were gmail, on GitHub used the masked email, I think.
• @pirzada-ahmadfaraz: commits locally were gmail, on GitHub used the masked email.
• @r3kste: Appears sometimes as Anton, sometimes as anTon, sometimes as r3kste, but the name on the profile is Anton now, so go with that.
• @raphaelquast: Two names for same email. Canonicalized on GitHub profile name.
• @rcomer: Probably masked email came in from changes made directly on GitHub; went with the Met email.
• @rwpenney: commits locally were personal domain, on GitHub used the masked email.
• @saranti: name appears 4 different ways with the same email, went with the name in the profile.
• @saumyacoder1709: the email address is invalid, and I can't find any other commits with a valid one, so use the masked GitHub email from FIX: Prevent warning when clearing axes with shared non-linear scale #30843.
• @scottshambaugh: Not sure why there are two masked emails, and neither appears to be more recent, so I went with the more frequent one (125 vs 69 commits.)
• @shriyakalakata: commits locally were gmail, on GitHub used the masked email; there was also a couple invalid emails that I canonicalized to this account.
• @star1327p: full name is mostly used; not sure why the username snuck in a few places.
• @stevezhang1999: first commit had an invalid email, and the rest were a mix of gmail and masked email. Canonicalized on the gmail.
• @stiglers-eponym: commits locally were gmail, on GitHub used the masked email.
• @tfpf: Replace tfpf with full name, as in profile. The username appears in older commits, but full name added later. There's also a gmail, but that seems to not be used any more.
• @thrien: the email on the commit from Fix get_path for 3d artists #27440 was invalid, so I took the name/email from the GitHub profile.
• @timhoffm: I've never seen the non-masked email before, and though they're in PRs you've made, the commits are no longer linked to your account. So I think those few commits were a mistake or an old email.
• @tinezivic: all commits use gmail, except the one squash merged PR, which used the masked email, so go with the first one.
• @tybeller: commits locally were gmail, on GitHub used the masked email.
• @vittoboa: commits locally were gmail, on GitHub used the masked email.