fix: Incorrect error message when periodlimit is not set on a feegrant tx (#10050)

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## Description

I updated the error check for periodlimit on a feegrant tx to return that the user needs to set the period limit rather than that the number of arguments is incorrect.

Closes: #10049 

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---

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- [x] added `!` to the type prefix if API or client breaking change
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- [ ] confirmed `!` in the type prefix if API or client breaking change
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CHANGELOG.md

@@ -112,6 +112,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 + [\#9980](https://github.com/cosmos/cosmos-sdk/pull/9980) Returning the error when the invalid argument is passed to bank query total supply cli.
 + [\#10061](https://github.com/cosmos/cosmos-sdk/pull/10061) Ensure that `LegacyAminoPubKey` struct correctly unmarshals from JSON
 * (server) [#10016](https://github.com/cosmos/cosmos-sdk/issues/10016) Fix marshaling of index-events into server config file.
+* (x/feegrant) [\#10049](https://github.com/cosmos/cosmos-sdk/issues/10049) Fixed the error message when `period` or `period-limit` flag is not set on a feegrant grant transaction.
 
 
 ### State Machine Breaking

x/feegrant/client/cli/tx.go

@@ -125,25 +125,28 @@ Examples:
 					return err
 				}
 
-				if periodClock > 0 && periodLimit != nil {
-					periodReset := getPeriodReset(periodClock)
-					if exp != "" && periodReset.Sub(expiresAtTime) > 0 {
-						return fmt.Errorf("period(%d) cannot reset after expiration(%v)", periodClock, exp)
-					}
-
-					periodic := feegrant.PeriodicAllowance{
-						Basic:            basic,
-						Period:           getPeriod(periodClock),
-						PeriodReset:      getPeriodReset(periodClock),
-						PeriodSpendLimit: periodLimit,
-						PeriodCanSpend:   periodLimit,
-					}
-
-					grant = &periodic
-
-				} else {
-					return fmt.Errorf("invalid number of args %d", len(args))
+				if periodClock <= 0 {
+					return fmt.Errorf("period clock was not set")
 				}
+
+				if periodLimit == nil {
+					return fmt.Errorf("period limit was not set")
+				}
+
+				periodReset := getPeriodReset(periodClock)
+				if exp != "" && periodReset.Sub(expiresAtTime) > 0 {
+					return fmt.Errorf("period (%d) cannot reset after expiration (%v)", periodClock, exp)
+				}
+
+				periodic := feegrant.PeriodicAllowance{
+					Basic:            basic,
+					Period:           getPeriod(periodClock),
+					PeriodReset:      getPeriodReset(periodClock),
+					PeriodSpendLimit: periodLimit,
+					PeriodCanSpend:   periodLimit,
+				}
+
+				grant = &periodic
 			}
 
 			allowedMsgs, err := cmd.Flags().GetStringSlice(FlagAllowedMsgs)