Before posing my specific question, I would like to state that there is obviously a great difference to ask about a narration's authenticity which is discussed to be either Hasan or Da'if. Interestingly, the following Hadith, like many others, is considered to be proven Sahih by the Muhaddith Shaykh Albani in his Sahih At-Tirmidhi and other books (and Ibn al-Qayyim), yet Al-Hafiz Ibn Hajar Asqalani deemed it to be Da'if (not proven) in Nata'ij al-Afkar (1/243-6).
Narrated in At-Tirmidhi (55), which Abu I'sa deemed to be not proven, that the Prophet (ﷺ) said, after making Wudu and the Shahadah:
[...] "Allahum-majalni minat-tau-wabin, waj'alni minal mutatahhirin" (Ya Allah, make me among the repentant, and make me among those who purify themselves) - "Then, eight Gates of Paradise are opened for him, that (he) may enter by whichever of them (he) wishes."
I would like to know which argument by those two scholars, and if possible from other Hadith-Scholars, is closer to the truth to understand if this Du'a is proven to be Sahih or Da'if (not proven)?