Help using MongoDB for plugin

[AB987]

I recently purchased a plugin called Mizu core, the link to which can be found here, and I set up my MongoDB/Redis correctly, using the same providers I used for other plugins, and it didn't work.
Here are my console logs:
25.10 09:37:44 [Server] WARN Exception in thread "Craft Scheduler Thread - 17"
25.10 09:37:44 [Server] WARN org.apache.commons.lang.UnhandledException: Plugin Mizu v1.8 generated an exception while executing task 838
25.10 09:37:44 [Server] INFO at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
25.10 09:37:44 [Server] INFO at org.github.paperspigot.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:23)
25.10 09:37:44 [Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
25.10 09:37:44 [Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
25.10 09:37:44 [Server] INFO at java.lang.Thread.run(Thread.java:74
25.10 09:37:44 [Server] INFO Caused by: Mizu.DF: Query failed with error code 13 and error message 'not authorized on mizu to execute command { find: "mizu_bans", filter: { UUID: BinData(3, 5D4DB3BD7F4FA0780B88653C42052687) }, limit: 1, singleBatch: true, $db: "mizu", $clusterTime: { clusterTime: Timestamp(1603633061, 91), signature: { hash: BinData(0, CFC61AA78C53C2C9B77249CD7C1AAC05ED49B6DD), keyId: 6862199081385590826 } }, lsid: { id: UUID("8f589668-5b38-4599-b117-66cef8e2ec38") }, $readPreference: { mode: "primaryPreferred" } }' on server btyazisl8ny0mmq-mongodb.services.clever-cloud.com:27017
25.10 09:37:44 [Server] INFO at Mizu.rV.a(rV.java)
25.10 09:37:44 [Server] INFO at Mizu.rV.a(rV.java)
25.10 09:37:44 [Server] INFO at Mizu.s3.a(s3.java)
25.10 09:37:44 [Server] INFO at Mizu.s3.a(s3.java)
25.10 09:37:44 [Server] INFO at Mizu.rU.a(rU.java)
25.10 09:37:44 [Server] INFO at Mizu.rU.a(rU.java)
25.10 09:37:44 [Server] INFO at Mizu.gm.a(gm.java)
25.10 09:37:44 [Server] INFO at Mizu.gM.c(gM.java)
25.10 09:37:44 [Server] INFO at Mizu.aO.b(aO.java)
25.10 09:37:44 [Server] INFO at Mizu.aO.a(aO.java)
25.10 09:37:44 [Server] INFO at Mizu.EQ.run(EQ.java)
25.10 09:37:44 [Server] INFO at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
25.10 09:37:44 [Server] INFO at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
From what I understand, the plugin doesn't have proper access to the database. (Other commands work, this happened when I tried to ban someone). Any help as to why this isn't working and how
Proof I bought it: