fix: Remove shorthand flag for topp option in add command

Signed-off-by: Rui Chen <rui@chenrui.dev>

cmd/auth/add.go

@@ -161,7 +161,7 @@ func init() {
 	// add flag for endpointName
 	addCmd.Flags().StringVarP(&endpointName, "endpointname", "n", "", "Endpoint Name, e.g. `endpoint-xxxxxxxxxxxx` (only for amazonbedrock, amazonsagemaker backends)")
 	// add flag for topP
-	addCmd.Flags().Float32VarP(&topP, "topp", "c", 0.5, "Probability Cutoff: Set a threshold (0.0-1.0) to limit word choices. Higher values add randomness, lower values increase predictability.")
+	addCmd.Flags().Float32VarP(&topP, "topp", "", 0.5, "Probability Cutoff: Set a threshold (0.0-1.0) to limit word choices. Higher values add randomness, lower values increase predictability.")
 	// add flag for topK
 	addCmd.Flags().Int32VarP(&topK, "topk", "c", 50, "Sampling Cutoff: Set a threshold (1-100) to restrict the sampling process to the top K most probable words at each step. Higher values lead to greater variability, lower values increases predictability.")
 	// max tokens